Locomotive valve gear



E. T. BIDEN."

LOCOMOTIVE VALVE GEAR. APPucATmN FILED mmso. 191g.

Y Patented aan. 3J, ma

"Mmmm,

. v Y* L DIDEN, a citizen of the United States, resid-l` UNITED STA'gEs.,

i y Epwann THOMPSON DIDEN, or P'INEBLUFF, Arkansas.

. LocomorrvnvA-Lvn'enana-.J

Specification of Letters Patent( PrENT oFFicE,

Application fued January l3o, 1era serialfm. 214,5o2. I

' .-ii: i To all whom et may concern:

Be vit knownthat I, EDWARD. TrromrsoN the wheel, a quick valve travel being secured, and a. fixed lead at any travel of the The numeral 1 marks'a drive wheel carried;

valve being obtained.y l V A A typical embodiment, merely, of the in -l ventiomis shown in the drawings, and,with in the scope of vwhat is claimed, changes such as 4a mechanic might make, may be resorted to without departing from the spirit of the invention. n

In the ,drawin .v -Figure 1 shows the valve gear in si e elevation, parts being.

sectioned; Figure 2 is a top plan whereln parts are broken away; and Figure 3 is an elevation of the crank.

by. an axle 3 and having a reinforcement 2 in which ismounted a pin LLdisposed ec-v centrically on the wheel.. The invention in# cludes a crank comprising a first partl 5, the

outer end of which is secured rigidly at 6 itially to actuate the Valve 30, to be loca-ted to the pin 4, the crank comprising a second part 7 disposed at an acute angle to the part 5r and carrying a connection 8 rigldly se cured at 9 tothe inner end of the part 5 of i auxiliary rod 21 being pivoted -at 32 to the' the crank. The outer end of the part 7 of` theA crank is supplied with a wrist pin' 10. i A main rodll is pivoted on 'the pin 10 and a main rod-12 is pivoted onv the connection 8.V Rock arms 14 and 15 are fulcrumed intermediate their ends on a suitable sup'-v port 16. The rod 11 ispivoted at 17 to the lower end of the rock arm 14 and the rod 12 At -18- there appears' a link to which an auxiliary4 rod 19 is p1voted at 20, an

link 18, the'pivotal connections 20 and 32 being spaced apart. As shown at 22, the rod 19 is 'pivoted' to the upper end of the rockvarm 14,.the rod 21 being pivoted at 23 to the 4'upper .end 0i. the 1 rock arm l5. Brackets 24 are 'secured tothe link' 18 between the pivot elements 32 and 20 and carry outstandin trunnions 25 connected with a ralslng an lowering device 26 which need not :be described in detail, since thisv part of the invention may be lconstructed as desired.

' Ihe link 18'slides on a block 27, for adjustment, the block being pivoted in a recess 28 :formed in an actuating member 29 connected with a slide valve 30 cooperating with a valve chest 31.

The link 18 is raised and lowered by the mechanism 26 to secure a reversal, -in the well known manner. The rods 11 land 12, belng actuated by the crank mechanism, tilt the rock arms lll-"15, motion being imparted to the valve .30 by the rods 21 and 19, the

link 18 and the actuating member 29. The rock arms 14-16 are used to maintain a iXed'lead on the valve 3() and this result wouldv not be obtained if the rods11-'12 were coupled directly to the link '18, but since the` rods 11--12 are pivoted to the lower ends of the rock arms, the link 18,

when raised or 1owered,'will move on a radiusv with the pivotal Vconnections 22 as centers, the link radius being'drawn. from the points -22 and not from the center of the main axle 3. vThe 'crank construction 5-7 affords a substitute for eccentrics, and permits the mechanism which is e'ective inand second parts disposed at an acuteangle --to each other, the outer end ofthe irst part being secured rigidly to the pin; aconnection rigidly secured to the first part of the crankga wrist pin mounted on the outer end of the second part of the crank; main rods one of whichis pivoted -at its rear end on the pin, the other of which is pivoted at its rear end on thel connection; rock arms and means for fulcruming the same intermediate their ends, the main rods being pivoted, each,l at its forward end, to the lower'endot` one ,rock arm; auxiliary rods each pivoted at its rear end to the upper end of one rock arm;

position' on the 'outside of,

rammed aan: 311,#1e22.

a link Whereunto the forward ends of the auxiliary arms are pivoted in spaced re1z1.y tlon to each other; a slide valve; :1n actuat- In testimony that I claim diier foregoing nhs my own, 1 have hereto afiixe'l my sgnnl0 ture 1n the presence of two witnesses.

EDWARD THOMPSON DIDEN.

Witnesses R. F; RQBINSON, L. I. SALLEE. 

